Laser-Induced Thermal Annealing of CH3NH3PbI3 Perovskite Microwires

Perovskite microwires have a larger surface-to-volume ratio and better photoelectric conversion efficiency than perovskite films. The degree of crystallization also affects the optoelectrical performances microwires. Laser annealing was regarded as tool for crystallization. High light absorption induced fast heating process. A 405 nm violet laser located near peak typical films employed laser. In an in situ experimental design, beam combined into micro Raman measurement system. Real-time information provided. Many excellent works were done, typically needed offline optoelectronic measurements. An mW-level continuous-wave can provide enough kinetic energy crystalline thermal distribution microwire under beams considered here. Polarized signals evidence This work offered novel approach on-site, real-time laser-induced design be used other material procedures. Intensity-dependent conditions crucial processes analyzed detail. substrate effect found. proposed scheme provided integrated novel, scalable, highly effective designs perovskite-based devices.